Makine Mühendisliği Bölümü Koleksiyonu: Recent submissions
Now showing items 321-340 of 373
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The energy efficient configurations of natural convection heat transfer in square enclosures with heatlines
(Yildiz Technical Univ, 2018)A steady state natural convection heat transfer is numerically investigated in a two-dimensional square enclosure. One of the side walls of the enclosure is brought to high temperature and the upper wall is insulated. the ... -
Saturated flow boiling characteristics in single rectangular minichannels: effect of aspect ratio
(Taylor & Francis Inc, 2018)In this study, saturated flow boiling characteristics of deionized water in single rectangular minichannels are investigated experimentally. A special attention is paid to the effect of aspect ratio (channel width to depth, ... -
A performance comparison study of uncoated and TiAlN coated carbide end mill on machining of the Al-35Zn alloy
(Iop Publishing Ltd, 2018)In this study, Al-35Zn alloy was produced by permanent mold casting. To investigate the cutting performance of uncoated and TiAlN coated carbide end mills on this alloy, a series of tests were carried out in the CNC vertical ... -
Effects of different cutting methods for electrical steel sheets on performance of induction motors
(Sage Publications Ltd, 2018)In this study, by cutting electrical steel stator laminations, one of the most important components of electrical machines by different cutting methods, the effects of these cutting methods on motor efficiency are investigated. ... -
A preface to the special issue section on "The Second International Hydrogen Technologies Congress (IHTEC 2017), 15-18 March 2017, Adana, Turkey"
(Pergamon-Elsevier Science Ltd, 2018)Hydrogen energy studies are considered to be vital for the future energy scenarios of Turkey. In this regard, in order to investigate and develop the existing potential of hydrogen energy studies in Turkey and other ... -
Exergetic performance comparison of air and hydrogen gas flowing through the annular curved duct
(Pergamon-Elsevier Science Ltd, 2018)The main objective of this study is to parametrically compare the exergetic performance of air and hydrogen gas flow through the curved annular duct. For this purpose, it is assumed that, i) air and hydrogen are considered ... -
Experimental investigation of coaxial impinging air jets
(Pergamon-Elsevier Science Ltd, 2018)This study experimentally investigates hydrodynamical and thermal characteristics of coaxial confined impinging turbulent air jets. Various values of the dimensionless nozzle-to-plate distances and dimensionless flowrate ... -
Experimental investigation of heat transfer characteristics and wall pressure distribution of swirling coaxial confined impinging air jets
(Pergamon-Elsevier Science Ltd, 2018)In the present study, swirling coaxial confined impinging turbulent air jets issuing from a novel designed nozzle is studied experimentally. Heat transfer characteristics and pressure distribution on the impingement plate ... -
Experimental investigation of flow boiling in single minichannels with low mass velocities
(Pergamon-Elsevier Science Ltd, 2018)Flow boiling characteristics in a single minichannel with the aspect ratio of 2 (1.8 mm width and 0.9 mm height) are studied experimentally. Experiments are conducted for different values of the wall heat flux (in the range ... -
Improving thermal power of a cylindrical solar cooker via novel micro/nano porous absorbers: A thermodynamic analysis with experimental validation
(Pergamon-Elsevier Science Ltd, 2018)In this paper, cylindrical solar cookers with microporous absorbers are experimentally and numerically investigated in terms of thermodynamic performance figures. For a typical spring day in Bayburt, which is a good example ... -
Thermoelectric coolers (TECs): from theory to practice
(Springer, 2019)Thermoelectric coolers (TECs) are solid state units, which provide reliable energy conversion with no noise or vibration. They are also lightweight and do not include any moving parts. the current coefficient of performance ... -
Bor ile yapılan tane inceltmenin Al-30Zn alaşımının mikroyapı ve mekanik özelliklerine etkisi
(Gazi Univ, Fac Engineering Architecture, 2019)In this study, one binary aluminum-zinc (Al-30Zn) alloy and nine ternary aluminum-zinc-boron [Al-30Zn-(0.01-2) B] alloys were produced by permanent mold casting method. Structural properties of the produced alloys were ... -
Room temperature superplaticity in fine/ultrafine grained materials subjected to severe plastic deformation
(Japan Inst Metals & Materials, 2019)Achieving superplasticity at high temperatures and at very low strain rates is considered to be the most important disadvange of superplastic forming processes. Therefore, it is crucial to achieve superplastic behavior at ... -
Prediction of pressure drop for flow boiling in rectangular multi-microchannel heat sinks
(Taylor & Francis Inc, 2019)In this study, two new correlations are developed to predict pressure drop for the flow boiling in micro systems with low mass flux. the correlations developed rely on extensive experimental results. Experiments are conducted ... -
Effect of hydraulic diameter on flow boiling in rectangular microchannels
(Springer, 2019)An experimental study is conducted to investigate the effect of hydraulic diameter on the saturated flow boiling characteristics of deionized water in parallel rectangular microchannels. Experiments have been performed for ... -
A parametric study on thermodynamic performance of a SOFC oriented hybrid energy system
(Pergamon-Elsevier Science Ltd, 2019)In this paper, a parametric study of the performance of a SOFC system for several types of supplied fuels is carried out. A SOFC system which is assisted by some energy resources, namely biomass, solar energy and natural ... -
The mechanical compression performance of ultra-fine grained stainless steel pyramidal lattice core
(Taylor & Francis Inc, 2019)Severe plastic deformation (SPD) techniques are prospective ones having ability for desirable high mechanical properties to be achieved without any chemical change in metals. Equal-channel angular pressing (ECAP), one of ... -
Pressure wave propagation in pressurized thin-walled circular tubes under axial impact
(Pergamon-Elsevier Science Ltd, 2019)The pressurized thin-walled tubes are called as a member of adaptive energy absorbers of which energy absorbing performance can be controlled by variation of internal pressure. in this context, this study numerically ... -
Effect of strontium and magnesium additions on the microstructure and mechanical properties of Al-12Si alloys
(Korean Inst Metals Materials, 2019)In this study, a binary Al-12Si, eight ternary Al-12Si-Sr, and six quaternary Al-12Si-0.1Sr-(0.2-1)Mg alloys were produced by permanent mold casting. It was observed that microstructure of the binary alloy consisted of the ... -
The effect of Total flowrate on the cooling performance of swirling coaxial impinging jets
(Springer, 2019)Thermal management ability of swirling coaxial confined impinging air jets (SCCIAJ) are experimentally studied for different total flowrate. the coaxial structure of the jet is provided by a nozzle which is a cylindrical ...
